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27582E

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Image #   27582E
Name:   Red blood cells in a blood clot
Copyright:   Copyright 2008 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Human red blood cells trapped in a fibrin blood clot. Platelets (not seen) are cell fragments in the blood that play an essential role in blood clotting and wound repair. Platelets can also activate certain immune responses. Platelets are formed in the red bone marrow, lungs, and spleen by fragmentation of very large cells known as megakaryocytes. Platelets in the blood are small oval disks and are termed nonactivated platelets or thrombocytes. Platelets serve as the body's first line of defense to prevent excessive blood loss. When an injury such as a cut is sustained, platelets change their shape (now known as activated platelets), become sticky and build up on a vessel wall to form a plug. They are also involved in the secretion of a chemical platelet factor which helps produce threads of fibrin. Bloods cells collect in the entangled fibrin and platelet mass forming a blood clot at the site.
Magnification*: x3,400
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   02.01.08 27582E activated platelets blood blood clot blood clotting clot erythrocyte erythrocytes fibrin fibrin clot hemoglobin human medical nonactivated platelets platelet platelets red blood cell red blood cells SEM thrombocyte thrombocytes

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